Using so much phone causes all issues. You generally use right hand for doing all the time. All devices are somehow their bad effects. Try to use less time. You may shift ur work on laptop or desktop. Can also check with ur doctor . You can also take the the help of a counsellor. It might be ur psychological issue.
Next Steps
check with a doctor. and if there is no medical issue .catch to a psychologist.
Health Tips
try to shift ur work on hand free device. you can also do proper exercise. take proper time interval